Afifi Ismail, Mohamad, et al. “Application of Ziziphus Jujube (Red Date), Camellia Sinensis (Black Tea) and Aleurites Moluccana (Candle Nut) Marinades As Beef Meat Tenderizer”. International Journal of Engineering & Technology, vol. 7, no. 4.14, Dec. 2019, pp. 307-11, https://doi.org/10.14419/ijet.v7i4.14.27662.